css/cssom-view/scrollIntoView-stuck.tentative.html

<!doctype html>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,minimum-scale=1">
<title>CSSOM View - scrollIntoView doesn't consider scroll-padding when target is stuck</title>
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
<link rel="author" title="Mozilla" href="https://mozilla.org">
<link rel="help" href="https://drafts.csswg.org/cssom-view/#dom-element-scrollintoview">
<link rel="help" href="https://drafts.csswg.org/css-scroll-snap-1/#scroll-padding">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1795661">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
body { margin: 0 }
:root { overflow: hidden }
#container {
  height: 100vh;
  overflow: auto;
  scroll-padding-top: 100px;
}
#sticky {
  position: sticky;
  background: Canvas;
  top: 0;
}
#content {
  height: 500vh;
  background-image: linear-gradient(green, purple);
}
</style>
<div id="container">
  <div id="sticky">
    <input type=text>
  </div>
  <div id="content"></div>
</div>
<script>
let container = document.getElementById("container");
let sticky = document.getElementById("sticky");
test(() => {
  // Scroll to the bottom.
  container.scrollTo(0, 100000);

  let scrollTop = container.scrollTop;

  assert_not_equals(scrollTop, 0, "Should have scrolled");

  // Focus on the stuck input. We shouldn't scroll up.
  sticky.querySelector("input").scrollIntoView();

  assert_equals(scrollTop, container.scrollTop, "Shouldn't have scrolled");
});
</script>